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4 | <HEAD> | |
5 | <TITLE>wxWindows 2 FAQ: General</TITLE> | |
6 | </HEAD> | |
7 | ||
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10 | <font face="Arial, Lucida Sans, Helvetica"> | |
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4e4dc03d | 12 | <table width=100% border=0 cellpadding=3 cellspacing=0> |
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14 | <td bgcolor="#004080" align=left height=24 background="images/bluetitlegradient.gif"> |
15 | <font size=+1 face="Arial, Lucida Sans, Helvetica" color="#FFFFFF"> | |
16 | <b>wxWindows 2 FAQ: General</b> | |
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17 | </font> |
18 | </td> | |
19 | </tr> | |
20 | </table> | |
21 | ||
22 | <P> | |
23 | ||
24 | See also <a href="faq.htm">top-level FAQ page</a>. | |
25 | <hr> | |
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26 | <h3>List of questions in this category</h3> |
27 | <ul> | |
28 | <li><a href="#whatis">What is wxWindows?</a></li> | |
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29 | <li><a href="#licence">Can I use wxWindows 2 for both proprietary projects, and GPL'ed projects?</a></li> |
30 | <li><a href="#support">Is there support?</a></li> | |
8b283bb8 | 31 | <li><a href="#users">Who uses wxWindows?</a></li> |
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32 | <li><a href="#platforms">What platforms are supported by wxWindows?</a></li> |
33 | <li><a href="#specific">How does wxWindows support platform-specific features?</a></li> | |
8b283bb8 | 34 | <li><a href="#stl">Does wxWindows use STL? or the standard string class?</a></li> |
2b5f62a0 | 35 | <li><a href="#richedit">Is there a rich edit/markup widget for wxWindows?</a></ li> |
53e112a0 | 36 | <li><a href="#exceptions">How to use C++ exceptions with wxWindows?</a></ li> |
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37 | <li><a href="#dev">How is wxWindows being developed?</a></li> |
38 | <li><a href="#distrib">How is wxWindows distributed?</a></li> | |
8b283bb8 | 39 | <li><a href="#future">What are the plans for the future?</a></li> |
2b5f62a0 | 40 | <li><a href="#base">What is wxBase?</a></li> |
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41 | <li><a href="#univ">What is wxUniversal?</a></li> |
42 | <li><a href="#jave">What about Java?</a></li> | |
c2d48b36 | 43 | <li><a href="#dotnet">What about .NET/Mono?</a></li> |
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44 | <li><a href="#help">How can I help the project?</a></li> |
45 | </ul> | |
46 | <hr> | |
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47 | |
48 | <H3><a name="whatis">What is wxWindows?</a></H3> | |
49 | ||
50 | wxWindows is a class library that allows you to compile graphical C++ programs on a range of | |
51 | different platforms. wxWindows defines a common API across platforms, but uses the native graphical user interface (GUI) on each platform, | |
8b283bb8 | 52 | so your program will take on the native 'look and feel' that users are familiar with.<P> |
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53 | |
54 | Although GUI applications are mostly built programmatically, there is a dialog editor to help | |
8b283bb8 | 55 | build attractive dialogs and panels. Robert Roebling's <a href="http://www.roebling.com">wxDesigner</a> |
51ab9400 | 56 | makes light work of resizable, portable dialogs.<P> |
ce3ed50d | 57 | |
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58 | You don't have to use C++ to use wxWindows: there is a <a href="http://wxpython.org">Python interface</a> for wxWindows 2, |
59 | and also a <a href="http://wxperl.sourceforge.net" target=_top>Perl interface</a>. | |
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60 | <P> |
61 | ||
2b5f62a0 | 62 | <h3><a name="licence">Can I use wxWindows 2 for both proprietary (commercial) projects, and GPL'ed projects?</a></h3> |
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63 | |
64 | Yes. Please see the <a href="newlicen.htm">licence</a> for details, but basically | |
65 | you can distribute proprietary binaries without distributing any source code, and neither will wxWindows | |
66 | conflict with GPL code you may be using or developing with it. | |
67 | <P> | |
68 | The conditions for using wxWindows 2 are the same whether you are a personal, academic | |
69 | or commercial developer. | |
70 | <P> | |
71 | ||
2b5f62a0 | 72 | <h3><a name="support">Is there support?</a></h3> |
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73 | |
74 | No official support, but the mailing list is very helpful and some people say that | |
75 | wxWindows support is better than for much commercial software. The developers are | |
76 | keen to fix bugs as soon as possible, though obviously there are no guarantees. | |
77 | <P> | |
78 | ||
79 | <H3><a name="users">Who uses wxWindows?</a></H3> | |
80 | ||
81 | Many organisations - commercial, government, and academic - across the | |
8b283bb8 | 82 | world. It's impossible to estimate the true number of users, since |
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83 | wxWindows is obtained by many different means, and we cannot monitor |
84 | distribution. The mailing list contains around 300-400 entries which is | |
85 | quite large for a list of this type.<P> | |
86 | ||
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87 | See <a href="users.htm">Users</a> for a list of some users and their applications, and |
88 | also <A href="feedback.htm">Feedback</a> for comments.<P> | |
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89 | Our highest-profile user yet is industry veteran and Lotus Corp. founder Mitch Kapor |
90 | and his <a href="http://www.osafoundation.org" target=_new>Open Source Applications Foundation</a>. | |
91 | <P> | |
b953bdc2 | 92 | |
8b283bb8 | 93 | <H3><a name="platforms">What platforms are supported by wxWindows 2?</a></H3> |
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94 | |
95 | <ul> | |
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96 | <li>Windows 3.1, Windows 95/98, Windows NT, Windows 2000, Windows ME. |
97 | <li>Linux and other Unix platforms with GTK+. | |
98 | <li>Unix with Motif or the free Motif clone Lesstif. | |
99 | <li>Mac OS. | |
100 | <li>Embedded platforms are being investigated. See the <a href="wxuniv.htm">wxUniversal</a> project. | |
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101 | <li>An OS/2 port is in progress, and you can also compile wxWindows for GTK+ or Motif |
102 | on OS/2. | |
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103 | </ul> |
104 | <P> | |
105 | ||
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106 | <H3><a name="specific">How does wxWindows 2 support platform-specific |
107 | features?</a></H3> | |
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108 | |
109 | This is a hotly-debated topic amongst the developers. My own philosophy | |
110 | is to make wxWindows as platform-independent as possible, but allow in a | |
111 | few classes (functions, window styles) that are platform-specific. | |
112 | For example, Windows metafiles and Windows 95 taskbar icons have | |
113 | their own classes on Windows, but nowhere else. Because these classes | |
8b283bb8 | 114 | are provided and are wxWindows-compatible, it doesn't take much |
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115 | coding effort for an application programmer to add support for |
116 | some functionality that the user on a particular platform might otherwise | |
117 | miss. Also, some classes that started off as platform-specific, such | |
118 | as the MDI classes, have been emulated on other platforms. I can imagine | |
119 | that even wxTaskBarIcon may be implemented for Unix desktops one day. | |
120 | <P> | |
121 | ||
8b283bb8 | 122 | In other words, wxWindows is not a 'lowest common denominator' approach, |
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123 | but it will still be possible to write portable programs using the |
124 | core API. Forbidding some platform-specific classes would be a stupid | |
125 | approach that would alienate many potential users, and encourage | |
126 | the perception that toolkits such as wxWindows are not up to the demands | |
8b283bb8 | 127 | of today's sophisticated applications.<P> |
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128 | |
129 | Currently resources such as bitmaps and icons are handled in a platform-specific | |
130 | way, but it is hoped to reduce this dependence in due course.<P> | |
131 | ||
8b283bb8 | 132 | Another reason why wxWindows 2 is not a 'lowest common denominator' toolkit is that |
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133 | some functionality missing on some platform has been provided using generic, |
134 | platform-independent code, such as the wxTreeCtrl and wxListCtrl classes.<P> | |
135 | ||
8b283bb8 | 136 | <H3><a name="stl">Does wxWindows use STL? or the standard string class?</a></H3> |
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137 | |
138 | No. This is a much-discussed topic that has (many times) ended with the conclusion that it is in | |
8b283bb8 | 139 | wxWindows' best interests to avoid use of templates. Not all compilers can handle |
b953bdc2 | 140 | templates adequately so it would dramatically reduce the number of compilers |
cd508246 | 141 | and platforms that could be supported. It would also be undersirable to make |
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142 | wxWindows dependent on another large library that may have to be downloaded and installed. |
143 | In addition, use of templates can lead to executable bloat, which is something | |
cd508246 | 144 | wxWindows 2 is strenously trying to avoid.<P> |
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145 | |
146 | The standard C++ string class is not used, again because it is not available to all compilers, | |
147 | and it is not necessarily a very efficient implementation. Also, we retain more flexibility | |
148 | by being able to modify our own string class. Some compatibility with the string class | |
149 | has been built into wxString.<P> | |
150 | ||
151 | There is nothing to stop an application using templates or the string class for its own | |
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152 | purposes. With wxWindows debugging options on, you may find you get errors when including |
153 | STL headers. You can work around it either by switching off memory checking, | |
154 | or by adding this to a header before you include any STL files:<P> | |
155 | ||
156 | <PRE> | |
157 | #ifdef new | |
158 | #undef new | |
159 | #endif | |
160 | </PRE> | |
161 | ||
162 | <P> | |
163 | ||
b953bdc2 | 164 | |
8b283bb8 | 165 | <H3><a name="richedit">Is there a rich edit/markup widget for wxWindows 2?</a></H3> |
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166 | |
167 | These are the possibilities so far:<P> | |
168 | ||
169 | <ul> | |
790ad94f | 170 | <li>See <a href="http://www.scintilla.org" target=_top>www.scintilla.org</a> for |
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171 | a very nice syntax-highlighting editor widget. Robin Dunn has written a wxWindows wrapper |
172 | for this widget, available in the wxWindows distribution under contrib/src/stc. | |
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173 | <li>If you only need to display marked-up information, rather than edit it, |
174 | then wxHTML will suit your needs. wxHTML is built into wxWindows - please see the reference | |
175 | manual for details, and samples/html. | |
176 | <li>There are rich edit widgets in both WIN32 and GTK+, but there is currently | |
8b283bb8 | 177 | no wxWindows wrapper for these (but text attribute functions are being added in the wxWindows 2.3.x series). |
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178 | </ul> |
179 | ||
180 | <P> | |
181 | ||
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182 | <h3><a name="exceptions">How to use C++ exceptions with wxWindows?</a></h3> |
183 | ||
184 | wxWindows library itself is unfortunately <i>not</i> exception-safe (as its | |
185 | initial version predates, by far, the addition of the exceptions to the C++ | |
186 | language). However you can still use the exceptions in your own code and use | |
187 | the other libraries using the exceptions for the error reporting together with | |
188 | wxWindows. | |
189 | ||
190 | <p> | |
191 | There are a few issues to keep in mind, though: | |
192 | <ul> | |
193 | <li>You shouldn't let the exceptions propagate through wxWindows code, | |
194 | in particular you should always catch the exceptions thrown by the | |
195 | functions called from an event handler in the handler itself and not | |
196 | let them propagate upwards to wxWindows. | |
197 | ||
198 | <li>You may need to ensure that the compiler support for the exceptions is | |
199 | enabled as, considering that wxWindows itself doesn't use the | |
200 | exceptions and turning their support on results in the library size | |
201 | augmentation of 10% to 20%, it is turned off by default for a few | |
202 | compilers. Moreover, for gcc (or at least its mingw version) you must | |
203 | also turn on the RTTI support to be able to use the exceptions, so you | |
204 | should use <tt>--disable-no_rtti --disable-no_exceptions</tt> options | |
205 | when configuring the library (attention to the double negation). | |
206 | </ul> | |
207 | ||
208 | <p> | |
209 | ||
2b5f62a0 | 210 | <H3><a name="dev">How is wxWindows being developed?</a></H3> |
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211 | |
212 | We are using the <a href="cvs.htm">CVS</a> system to develop and maintain wxWindows. This allows | |
2b5f62a0 | 213 | us to make alterations and upload them instantly to the server, from |
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214 | which others can update their source.<P> |
215 | ||
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216 | To build source from CVS, see the file BuildCVS.txt in the top-level wxWindows distribution |
217 | directory.<P> | |
218 | ||
2b5f62a0 | 219 | <H3><a name="distrib">How is wxWindows distributed?</a></H3> |
b953bdc2 | 220 | |
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221 | By ftp, and via the <a href="cdrom2.htm">wxWindows CD-ROM</a>. |
222 | <P> | |
223 | If you are feeling adventurous, you may also check out the sources directly | |
2b5f62a0 | 224 | from <a href="cvs.htm">cvs</a>. |
8b283bb8 | 225 | <p> |
b953bdc2 | 226 | |
8b283bb8 | 227 | <H3><a name="future">What are the plans for the future?</a></H3> |
b953bdc2 | 228 | |
2b5f62a0 | 229 | Currently we're working too hard on getting wxWindows finished (are GUI toolkits ever |
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230 | finished?) to think very far ahead. However, we know we want to make wxWindows as robust |
231 | and well-publicised as possible. We also want to aim for better platform-independence of | |
2b5f62a0 | 232 | resources such as icons and bitmaps, standardising on PNG and XPM for all platforms.<P> |
b953bdc2 | 233 | |
91c93c99 | 234 | Other possibilities include: DCOM/CORBA compatibility; a wxWindows book; |
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235 | <a href="http://wxworkshop.sourceforge.net/">wxWorkshop</a>, an IDE; |
236 | other platforms, especially embedded systems; other interface abilities such as speech output.<P> | |
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237 | |
238 | We will investigate the possibility of compiler or operating system vendors bundling wxWindows with | |
239 | their product.<P> | |
240 | ||
241 | The high-level goal of wxWindows is to be thought of as the number one C++ framework, | |
242 | for virtually any platform. Move over, MFC!<P> | |
243 | ||
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244 | <h3><a name="base">What is wxBase?</a></h3> |
245 | ||
246 | wxBase is a subset of wxWindows comprised by the non-GUI classes. It includes | |
247 | wxWindows container and primitive data type classes (including wxString, | |
248 | wxDateTime and so on) and also useful wrappers for the operating system objects | |
249 | such as files, processes, threads, sockets and so on. With very minor | |
250 | exceptions wxBase may be used in exactly the same way as wxWindows but it | |
251 | doesn't require a GUI to run and so is ideal for creating console mode | |
252 | utilities or server programs. It is also possible to create a program which can | |
253 | be compiled either as a console application (using wxBase) or a GUI one (using | |
254 | a full featured wxWindows port). | |
255 | ||
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256 | <H3><a name="univ">What is wxUniversal?</a></H3> |
257 | ||
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258 | The main difference between wxUniversal-based ports (such as wxX11, wxMGL) and other ports (such as wxMSW, wxGTK+, wxMac) |
259 | is that wxUniversal implements all controls (or widgets) in | |
260 | wxWindows itself thus allowing to have much more flexibility (for example, support for | |
261 | themes even under MS Windows). It also means that it is now much easier to | |
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262 | port wxWindows to a new platform as only the low-level classes must be ported |
263 | which make for a small part of the library. | |
264 | <p> | |
265 | You may find more about wxUniversal <a href=wxuniv.htm>here</a>. | |
266 | ||
267 | <H3><a name="jave">What about Java?</a></H3> | |
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268 | |
269 | The Java honeymoon period is over :-) and people are realising that it cannot | |
8b283bb8 | 270 | meet all their cross-platform development needs. We don't anticipate a major threat |
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271 | from Java, and the level of interest in wxWindows is as high as ever.<P> |
272 | ||
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273 | <H3><a name="dotnet">What about .NET/Mono?</a></H3> |
274 | ||
275 | Microsoft is spending a lot on promoting the .NET initiative, which | |
276 | is a set of languages, APIs and web service components for Windows. | |
277 | Ximian has started an open source version of .NET, mostly for Linux. | |
278 | C# is Microsoft's alternative to Java, supporting 'managed code', | |
279 | garbage collection and various other Java-like language features.<P> | |
280 | ||
281 | Although this may be attractive to some developers, there | |
282 | is a variety of reasons why the .NET/Mono combination is unlikely | |
283 | to make wxWindows redundant. Please note that the following comments | |
284 | are Julian Smart's opinions.<P> | |
285 | ||
286 | <ol> | |
287 | <li>Not everyone wants or needs net services. | |
288 | <li>C++ will be used for a long time to come; compared with C++, C# is a recent development and its future is not certain. | |
289 | <li>Mono Forms may only target Winelib (at least to begin with), so the end result is not as native as | |
290 | wxWindows (I'm aware there is GTK# for use with the C# language). | |
291 | <li>C# is usually byte-compiled and therefore slower. Plus, .NET adds a layer of overhead to the client computer | |
292 | that wxWindows does not require. | |
293 | <li>Mono hasn't proven its long-term viability yet (it's a complex system of components); wxWindows is ready now. | |
294 | <li>You may not wish to buy into Microsoft marketing spin and APIs. | |
295 | <li>.NET might never be implemented on some platforms, especially Mac and embedded variants of Linux. | |
296 | <li>wxPython and other language variants provide further reasons for wxWindows to continue. | |
297 | <li>The same issue exists for Qt: if Qt sales remain strong, it's a good indication that | |
298 | the market for a C++-based approach is still there. (Either that, or everyone's turning to wxWindows!) | |
299 | </ol> | |
300 | ||
301 | There is nothing to stop folk from developing a C# version of the wxWindows API; | |
302 | we already have bindings to Python, Perl, JavaScript, Lua, Basic, and Eiffel. | |
303 | Update: a <a href="http://wxnet.sourceforge.net/" target=_new>wx.NET</a> project is now in progress. | |
304 | ||
305 | <P> | |
306 | ||
8b283bb8 | 307 | <H3><a name="help">How can I help the project?</a></H3> |
b953bdc2 | 308 | |
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309 | Please check out the <a href="http://www.wxwindows.org/develop2.htm">Community</a> pages, |
310 | in particular the <a href="projects.htm">suggested projects</a>, and | |
2b5f62a0 | 311 | mail the developers' mailing list with your own suggestions.<P> |
b953bdc2 | 312 | |
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313 | </font> |
314 | ||
315 | </BODY> | |
316 | ||
317 | </HTML> |